Nowadays you can plug a location into the Gas Buddy app and get the price almost anywhere in the US (found Fairbanks & Anchorage, but not Wasilla ... and, yes, Honolulu was found). I suspect it's a function of how many Gas Buddy users there are since their input builds most (all?) of the database.

Here in Wasilla, a gallon of 87 octane regular gas goes for $3.239 a gallon. It's a cent or two more or less in Anchorage, except the Anchorage mayor, last year, who put a ten cent per gallon tax on gas, allegedly to help pay for education. The price of oil has taken a dip lately, so it's possible the price of gas could go down slightly again.